Lighting and Horns: Testing and Inspection

GENERAL INFORMATION
Each vehicle is equipped with various lamp assemblies. A good ground is necessary for proper lighting operation. Grounding is provided by the lamp socket when it comes in contact with the metal body, or through a separate ground wire.

When changing lamp bulbs check the socket for corrosion. if corrosion is present, clean it with a wire brush and coat the inside of the socket lightly with Mopar Multi-Purpose Grease or equivalent.

INTERIOR LIGHTING
The courtesy lights are controlled by the CTM. The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp the ash receiver lamp (if equipped) are not controlled by the CTM. They are hardwired to individual switches and fuses.

The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door disarm switch input or the door jamb switch input, the interior courtesy lights will be turned ON. The illuminated entry function is canceled if the CTM senses an ignition "ON" condition or the "lock" command from a valid key fob.

If a door is left open or turned ON by rotation of dimmer switch for more than fifteen minutes, the CTM will extinguish the lamps to avoid discharging the battery. If the lamps are turned ON by courtesy lamp switch, the CTM will not be able to turn them OFF.

The Durango utilizes an interior light defeat switch as an integral part of the headlamp switch.

SYSTEM DIAGNOSIS
A good ground is necessary for proper lighting operation. Grounding is provided by the lamp socket when it comes in contact with the metal body, or through a separate ground wire.

Always begin any diagnosis by testing all of the fuses and circuit breakers in the system.